Absolutely. Anyone you do business with can do anything not forbidden by the law. But competition is a great reason to avoid doing things that make your customers unhappy.
If there was another cloud email provider that was as good as Gmail, but additionally had a reputation for never disabling accounts, I would switch to them. Gmail would lose my business, and I wouldn't have to worry about my account disappearing if some bayesnet decides I'm a bad guy.
Okay, but email is a highly competitive business. Competition doesn't mean you don't make customers unhappy, it just means you're judicious about how/when you do it. Any time you have to balance customer needs with abuse mitigation and legal compliance, you're going to have to do some things that make some customers unhappy in the name of being able to provide the wider service.
If there was another cloud email provider that was as good as Gmail, but additionally had a reputation for never disabling accounts, I would switch to them. Gmail would lose my business, and I wouldn't have to worry about my account disappearing if some bayesnet decides I'm a bad guy.